#!/usr/bin/python
#
# Copyright 2016 Red Hat | Ansible
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)

from __future__ import absolute_import, division, print_function
__metaclass__ = type


ANSIBLE_METADATA = {'metadata_version': '1.1',
                    'status': ['preview'],
                    'supported_by': 'community'}


DOCUMENTATION = '''

module: docker_service

short_description: Manage docker services and containers.

version_added: "2.1"

author: "Chris Houseknecht (@chouseknecht)"

description:
  - Consumes docker compose to start, shutdown and scale services.
  - Works with compose versions 1 and 2.
  - Compose can be read from a docker-compose.yml (or .yaml) file or inline using the C(definition) option.
  - See the examples for more details.
  - Supports check mode.

options:
  project_src:
      description:
        - Path to a directory containing a docker-compose.yml or docker-compose.yaml file.
        - Mutually exclusive with C(definition).
        - Required when no C(definition) is provided.
  project_name:
      description:
        - Provide a project name. If not provided, the project name is taken from the basename of C(project_src).
        - Required when C(definition) is provided.
  files:
      description:
        - List of file names relative to C(project_src). Overrides docker-compose.yml or docker-compose.yaml.
        - Files are loaded and merged in the order given.
  state:
      description:
        - Desired state of the project.
        - Specifying I(present) is the same as running I(docker-compose up).
        - Specifying I(absent) is the same as running I(docker-compose down).
      choices:
        - absent
        - present
      default: present
  services:
      description:
        - When C(state) is I(present) run I(docker-compose up) on a subset of services.
  scale:
      description:
        - When C(state) is I(present) scale services. Provide a dictionary of key/value pairs where the key
          is the name of the service and the value is an integer count for the number of containers.
  dependencies:
      description:
        - When C(state) is I(present) specify whether or not to include linked services.
      type: bool
      default: 'yes'
  definition:
      description:
        - Provide docker-compose yaml describing one or more services, networks and volumes.
        - Mutually exclusive with C(project_src) and C(files).
  hostname_check:
      description:
        - Whether or not to check the Docker daemon's hostname against the name provided in the client certificate.
      type: bool
      default: 'no'
  recreate:
      description:
        - By default containers will be recreated when their configuration differs from the service definition.
        - Setting to I(never) ignores configuration differences and leaves existing containers unchanged.
        - Setting to I(always) forces recreation of all existing containers.
      required: false
      choices:
        - always
        - never
        - smart
      default: smart
  build:
      description:
        - Use with state I(present) to always build images prior to starting the application.
        - Same as running docker-compose build with the pull option.
        - Images will only be rebuilt if Docker detects a change in the Dockerfile or build directory contents.
        - Use the C(nocache) option to ignore the image cache when performing the build.
        - If an existing image is replaced, services using the image will be recreated unless C(recreate) is I(never).
      type: bool
      default: 'no'
  pull:
      description:
        - Use with state I(present) to always pull images prior to starting the application.
        - Same as running docker-compose pull.
        - When a new image is pulled, services using the image will be recreated unless C(recreate) is I(never).
      type: bool
      default: 'no'
      version_added: "2.2"
  nocache:
      description:
        - Use with the build option to ignore the cache during the image build process.
      type: bool
      default: 'no'
      version_added: "2.2"
  remove_images:
      description:
        - Use with state I(absent) to remove the all images or only local images.
      choices:
          - 'all'
          - 'local'
  remove_volumes:
      description:
        - Use with state I(absent) to remove data volumes.
      type: bool
      default: 'no'
  stopped:
      description:
        - Use with state I(present) to leave the containers in an exited or non-running state.
      type: bool
      default: 'no'
  restarted:
      description:
        - Use with state I(present) to restart all containers.
      type: bool
      default: 'no'
  remove_orphans:
      description:
        - Remove containers for services not defined in the compose file.
      type: bool
      default: false
  timeout:
    description:
        - timeout in seconds for container shutdown when attached or when containers are already running.
    default: 10

extends_documentation_fragment:
    - docker

requirements:
    - "python >= 2.6"
    - "docker-py >= 1.8.0"
    - "Please note that the L(docker-py,https://pypi.org/project/docker-py/) Python
       module has been superseded by L(docker,https://pypi.org/project/docker/)
       (see L(here,https://github.com/docker/docker-py/issues/1310) for details).
       For Python 2.6, C(docker-py) must be used. Otherwise, it is recommended to
       install the C(docker) Python module. Note that both modules should I(not)
       be installed at the same time. Also note that when both modules are installed
       and one of them is uninstalled, the other might no longer function and a
       reinstall of it is required."
    - "docker-compose >= 1.7.0"
    - "Docker API >= 1.20"
    - "PyYAML >= 3.11"
'''

EXAMPLES = '''
# Examples use the django example at U(https://docs.docker.com/compose/django/). Follow it to create the flask
# directory

- name: Run using a project directory
  hosts: localhost
  connection: local
  gather_facts: no
  tasks:
    - docker_service:
        project_src: flask
        state: absent

    - docker_service:
        project_src: flask
      register: output

    - debug:
        var: output

    - docker_service:
        project_src: flask
        build: no
      register: output

    - debug:
        var: output

    - assert:
        that: "not output.changed "

    - docker_service:
        project_src: flask
        build: no
        stopped: true
      register: output

    - debug:
        var: output

    - assert:
        that:
          - "not web.flask_web_1.state.running"
          - "not db.flask_db_1.state.running"

    - docker_service:
        project_src: flask
        build: no
        restarted: true
      register: output

    - debug:
        var: output

    - assert:
        that:
          - "web.flask_web_1.state.running"
          - "db.flask_db_1.state.running"

- name: Scale the web service to 2
  hosts: localhost
  connection: local
  gather_facts: no
  tasks:
    - docker_service:
        project_src: flask
        scale:
          web: 2
      register: output

    - debug:
        var: output

- name: Run with inline v2 compose
  hosts: localhost
  connection: local
  gather_facts: no
  tasks:
    - docker_service:
        project_src: flask
        state: absent

    - docker_service:
        project_name: flask
        definition:
          version: '2'
          services:
            db:
              image: postgres
            web:
              build: "{{ playbook_dir }}/flask"
              command: "python manage.py runserver 0.0.0.0:8000"
              volumes:
                - "{{ playbook_dir }}/flask:/code"
              ports:
                - "8000:8000"
              depends_on:
                - db
      register: output

    - debug:
        var: output

    - assert:
        that:
          - "web.flask_web_1.state.running"
          - "db.flask_db_1.state.running"

- name: Run with inline v1 compose
  hosts: localhost
  connection: local
  gather_facts: no
  tasks:
    - docker_service:
        project_src: flask
        state: absent

    - docker_service:
        project_name: flask
        definition:
            db:
              image: postgres
            web:
              build: "{{ playbook_dir }}/flask"
              command: "python manage.py runserver 0.0.0.0:8000"
              volumes:
                - "{{ playbook_dir }}/flask:/code"
              ports:
                - "8000:8000"
              links:
                - db
      register: output

    - debug:
        var: output

    - assert:
        that:
          - "web.flask_web_1.state.running"
          - "db.flask_db_1.state.running"
'''

RETURN = '''
service:
  description: Name of the service.
  returned: success
  type: complex
  contains:
      container_name:
          description: Name of the container. Format is I(project_service_#).
          returned: success
          type: complex
          contains:
              cmd:
                  description: One or more commands to be executed in the container.
                  returned: success
                  type: list
                  example: ["postgres"]
              image:
                  description: Name of the image from which the container was built.
                  returned: success
                  type: str
                  example: postgres
              labels:
                  description: Meta data assigned to the container.
                  returned: success
                  type: complex
                  example: {...}
              networks:
                  description: Contains a dictionary for each network to which the container is a member.
                  returned: success
                  type: complex
                  contains:
                      IPAddress:
                          description: The IP address assigned to the container.
                          returned: success
                          type: str
                          example: 172.17.0.2
                      IPPrefixLen:
                          description: Number of bits used by the subnet.
                          returned: success
                          type: int
                          example: 16
                      aliases:
                          description: Aliases assigned to the container by the network.
                          returned: success
                          type: list
                          example: ['db']
                      globalIPv6:
                          description: IPv6 address assigned to the container.
                          returned: success
                          type: str
                          example: ''
                      globalIPv6PrefixLen:
                          description: IPv6 subnet length.
                          returned: success
                          type: int
                          example: 0
                      links:
                          description: List of container names to which this container is linked.
                          returned: success
                          type: list
                          example: null
                      macAddress:
                          description: Mac Address assigned to the virtual NIC.
                          returned: success
                          type: str
                          example: "02:42:ac:11:00:02"
              state:
                  description: Information regarding the current disposition of the container.
                  returned: success
                  type: complex
                  contains:
                      running:
                          description: Whether or not the container is up with a running process.
                          returned: success
                          type: bool
                          example: true
                      status:
                          description: Description of the running state.
                          returned: success
                          type: str
                          example: running

actions:
  description: Provides the actions to be taken on each service as determined by compose.
  returned: when in check mode or I(debug) true
  type: complex
  contains:
      service_name:
          description: Name of the service.
          returned: always
          type: complex
          contains:
              pulled_image:
                  description: Provides image details when a new image is pulled for the service.
                  returned: on image pull
                  type: complex
                  contains:
                      name:
                          description: name of the image
                          returned: always
                          type: str
                      id:
                          description: image hash
                          returned: always
                          type: str
              built_image:
                  description: Provides image details when a new image is built for the service.
                  returned: on image build
                  type: complex
                  contains:
                      name:
                          description: name of the image
                          returned: always
                          type: str
                      id:
                          description: image hash
                          returned: always
                          type: str

              action:
                  description: A descriptive name of the action to be performed on the service's containers.
                  returned: always
                  type: list
                  contains:
                      id:
                          description: the container's long ID
                          returned: always
                          type: str
                      name:
                          description: the container's name
                          returned: always
                          type: str
                      short_id:
                          description: the container's short ID
                          returned: always
                          type: str
'''

import os
import re
import sys
import tempfile
from contextlib import contextmanager
from distutils.version import LooseVersion

try:
    import yaml
    HAS_YAML = True
    HAS_YAML_EXC = None
except ImportError as exc:
    HAS_YAML = False
    HAS_YAML_EXC = str(exc)

try:
    from compose import __version__ as compose_version
    from compose.cli.command import project_from_options
    from compose.service import NoSuchImageError
    from compose.cli.main import convergence_strategy_from_opts, build_action_from_opts, image_type_from_opt
    from compose.const import DEFAULT_TIMEOUT
    HAS_COMPOSE = True
    HAS_COMPOSE_EXC = None
    MINIMUM_COMPOSE_VERSION = '1.7.0'

except ImportError as exc:
    HAS_COMPOSE = False
    HAS_COMPOSE_EXC = str(exc)
    DEFAULT_TIMEOUT = 10

from ansible.module_utils.docker_common import AnsibleDockerClient, DockerBaseClass


AUTH_PARAM_MAPPING = {
    u'docker_host': u'--host',
    u'tls': u'--tls',
    u'cacert_path': u'--tlscacert',
    u'cert_path': u'--tlscert',
    u'key_path': u'--tlskey',
    u'tls_verify': u'--tlsverify'
}


@contextmanager
def stdout_redirector(path_name):
    old_stdout = sys.stdout
    fd = open(path_name, 'w')
    sys.stdout = fd
    try:
        yield
    finally:
        sys.stdout = old_stdout


@contextmanager
def stderr_redirector(path_name):
    old_fh = sys.stderr
    fd = open(path_name, 'w')
    sys.stderr = fd
    try:
        yield
    finally:
        sys.stderr = old_fh


def make_redirection_tempfiles():
    _, out_redir_name = tempfile.mkstemp(prefix="ansible")
    _, err_redir_name = tempfile.mkstemp(prefix="ansible")
    return (out_redir_name, err_redir_name)


def cleanup_redirection_tempfiles(out_name, err_name):
    for i in [out_name, err_name]:
        os.remove(i)


def get_redirected_output(path_name):
    output = []
    with open(path_name, 'r') as fd:
        for line in fd:
            # strip terminal format/color chars
            new_line = re.sub(r'\x1b\[.+m', '', line)
            output.append(new_line)
    os.remove(path_name)
    return output


def attempt_extract_errors(exc_str, stdout, stderr):
    errors = [l.strip() for l in stderr if l.strip().startswith('ERROR:')]
    errors.extend([l.strip() for l in stdout if l.strip().startswith('ERROR:')])

    warnings = [l.strip() for l in stderr if l.strip().startswith('WARNING:')]
    warnings.extend([l.strip() for l in stdout if l.strip().startswith('WARNING:')])

    # assume either the exception body (if present) or the last warning was the 'most'
    # fatal.

    if exc_str.strip():
        msg = exc_str.strip()
    elif errors:
        msg = errors[-1].encode('utf-8')
    else:
        msg = 'unknown cause'

    return {
        'warnings': [w.encode('utf-8') for w in warnings],
        'errors': [e.encode('utf-8') for e in errors],
        'msg': msg,
        'module_stderr': ''.join(stderr),
        'module_stdout': ''.join(stdout)
    }


def get_failure_info(exc, out_name, err_name=None, msg_format='%s'):
    if err_name is None:
        stderr = []
    else:
        stderr = get_redirected_output(err_name)
    stdout = get_redirected_output(out_name)

    reason = attempt_extract_errors(str(exc), stdout, stderr)
    reason['msg'] = msg_format % reason['msg']
    return reason


class ContainerManager(DockerBaseClass):

    def __init__(self, client):

        super(ContainerManager, self).__init__()

        self.client = client
        self.project_src = None
        self.files = None
        self.project_name = None
        self.state = None
        self.definition = None
        self.hostname_check = None
        self.timeout = None
        self.remove_images = None
        self.remove_orphans = None
        self.remove_volumes = None
        self.stopped = None
        self.restarted = None
        self.recreate = None
        self.build = None
        self.dependencies = None
        self.services = None
        self.scale = None
        self.debug = None
        self.pull = None
        self.nocache = None

        for key, value in client.module.params.items():
            setattr(self, key, value)

        self.check_mode = client.check_mode

        if not self.debug:
            self.debug = client.module._debug

        self.options = dict()
        self.options.update(self._get_auth_options())
        self.options[u'--skip-hostname-check'] = (not self.hostname_check)

        if self.project_name:
            self.options[u'--project-name'] = self.project_name

        if self.files:
            self.options[u'--file'] = self.files

        if not HAS_COMPOSE:
            self.client.fail("Unable to load docker-compose. Try `pip install docker-compose`. Error: %s" %
                             HAS_COMPOSE_EXC)

        if LooseVersion(compose_version) < LooseVersion(MINIMUM_COMPOSE_VERSION):
            self.client.fail("Found docker-compose version %s. Minimum required version is %s. "
                             "Upgrade docker-compose to a min version of %s." %
                             (compose_version, MINIMUM_COMPOSE_VERSION, MINIMUM_COMPOSE_VERSION))

        self.log("options: ")
        self.log(self.options, pretty_print=True)

        if self.definition:
            if not HAS_YAML:
                self.client.fail("Unable to load yaml. Try `pip install PyYAML`. Error: %s" % HAS_YAML_EXC)

            if not self.project_name:
                self.client.fail("Parameter error - project_name required when providing definition.")

            self.project_src = tempfile.mkdtemp(prefix="ansible")
            compose_file = os.path.join(self.project_src, "docker-compose.yml")
            try:
                self.log('writing: ')
                self.log(yaml.dump(self.definition, default_flow_style=False))
                with open(compose_file, 'w') as f:
                    f.write(yaml.dump(self.definition, default_flow_style=False))
            except Exception as exc:
                self.client.fail("Error writing to %s - %s" % (compose_file, str(exc)))
        else:
            if not self.project_src:
                self.client.fail("Parameter error - project_src required.")

        try:
            self.log("project_src: %s" % self.project_src)
            self.project = project_from_options(self.project_src, self.options)
        except Exception as exc:
            self.client.fail("Configuration error - %s" % str(exc))

    def exec_module(self):
        result = dict()

        if self.state == 'present':
            result = self.cmd_up()
        elif self.state == 'absent':
            result = self.cmd_down()

        if self.definition:
            compose_file = os.path.join(self.project_src, "docker-compose.yml")
            self.log("removing %s" % compose_file)
            os.remove(compose_file)
            self.log("removing %s" % self.project_src)
            os.rmdir(self.project_src)

        if not self.check_mode and not self.debug and result.get('actions'):
            result.pop('actions')

        return result

    def _get_auth_options(self):
        options = dict()
        for key, value in self.client.auth_params.items():
            if value is not None:
                option = AUTH_PARAM_MAPPING.get(key)
                if option:
                    options[option] = value
        return options

    def cmd_up(self):

        start_deps = self.dependencies
        service_names = self.services
        detached = True
        result = dict(changed=False, actions=[], ansible_facts=dict())

        up_options = {
            u'--no-recreate': False,
            u'--build': False,
            u'--no-build': False,
            u'--no-deps': False,
            u'--force-recreate': False,
        }

        if self.recreate == 'never':
            up_options[u'--no-recreate'] = True
        elif self.recreate == 'always':
            up_options[u'--force-recreate'] = True

        if self.remove_orphans:
            up_options[u'--remove-orphans'] = True

        converge = convergence_strategy_from_opts(up_options)
        self.log("convergence strategy: %s" % converge)

        if self.pull:
            pull_output = self.cmd_pull()
            result['changed'] = pull_output['changed']
            result['actions'] += pull_output['actions']

        if self.build:
            build_output = self.cmd_build()
            result['changed'] = build_output['changed']
            result['actions'] += build_output['actions']

        for service in self.project.services:
            if not service_names or service.name in service_names:
                plan = service.convergence_plan(strategy=converge)
                if plan.action != 'noop':
                    result['changed'] = True
                    result_action = dict(service=service.name)
                    result_action[plan.action] = []
                    for container in plan.containers:
                        result_action[plan.action].append(dict(
                            id=container.id,
                            name=container.name,
                            short_id=container.short_id,
                        ))
                    result['actions'].append(result_action)

        if not self.check_mode and result['changed']:
            out_redir_name, err_redir_name = make_redirection_tempfiles()
            try:
                with stdout_redirector(out_redir_name):
                    with stderr_redirector(err_redir_name):
                        do_build = build_action_from_opts(up_options)
                        self.log('Setting do_build to %s' % do_build)
                        self.project.up(
                            service_names=service_names,
                            start_deps=start_deps,
                            strategy=converge,
                            do_build=do_build,
                            detached=detached,
                            remove_orphans=self.remove_orphans,
                            timeout=self.timeout)
            except Exception as exc:
                fail_reason = get_failure_info(exc, out_redir_name, err_redir_name,
                                               msg_format="Error starting project %s")
                self.client.module.fail_json(**fail_reason)
            else:
                cleanup_redirection_tempfiles(out_redir_name, err_redir_name)

        if self.stopped:
            stop_output = self.cmd_stop(service_names)
            result['changed'] = stop_output['changed']
            result['actions'] += stop_output['actions']

        if self.restarted:
            restart_output = self.cmd_restart(service_names)
            result['changed'] = restart_output['changed']
            result['actions'] += restart_output['actions']

        if self.scale:
            scale_output = self.cmd_scale()
            result['changed'] = scale_output['changed']
            result['actions'] += scale_output['actions']

        for service in self.project.services:
            result['ansible_facts'][service.name] = dict()
            for container in service.containers(stopped=True):
                inspection = container.inspect()
                # pare down the inspection data to the most useful bits
                facts = dict(
                    cmd=[],
                    labels=dict(),
                    image=None,
                    state=dict(
                        running=None,
                        status=None
                    ),
                    networks=dict()
                )
                if inspection['Config'].get('Cmd', None) is not None:
                    facts['cmd'] = inspection['Config']['Cmd']
                if inspection['Config'].get('Labels', None) is not None:
                    facts['labels'] = inspection['Config']['Labels']
                if inspection['Config'].get('Image', None) is not None:
                    facts['image'] = inspection['Config']['Image']
                if inspection['State'].get('Running', None) is not None:
                    facts['state']['running'] = inspection['State']['Running']
                if inspection['State'].get('Status', None) is not None:
                    facts['state']['status'] = inspection['State']['Status']

                if inspection.get('NetworkSettings') and inspection['NetworkSettings'].get('Networks'):
                    networks = inspection['NetworkSettings']['Networks']
                    for key in networks:
                        facts['networks'][key] = dict(
                            aliases=[],
                            globalIPv6=None,
                            globalIPv6PrefixLen=0,
                            IPAddress=None,
                            IPPrefixLen=0,
                            links=None,
                            macAddress=None,
                        )
                        if networks[key].get('Aliases', None) is not None:
                            facts['networks'][key]['aliases'] = networks[key]['Aliases']
                        if networks[key].get('GlobalIPv6Address', None) is not None:
                            facts['networks'][key]['globalIPv6'] = networks[key]['GlobalIPv6Address']
                        if networks[key].get('GlobalIPv6PrefixLen', None) is not None:
                            facts['networks'][key]['globalIPv6PrefixLen'] = networks[key]['GlobalIPv6PrefixLen']
                        if networks[key].get('IPAddress', None) is not None:
                            facts['networks'][key]['IPAddress'] = networks[key]['IPAddress']
                        if networks[key].get('IPPrefixLen', None) is not None:
                            facts['networks'][key]['IPPrefixLen'] = networks[key]['IPPrefixLen']
                        if networks[key].get('Links', None) is not None:
                            facts['networks'][key]['links'] = networks[key]['Links']
                        if networks[key].get('MacAddress', None) is not None:
                            facts['networks'][key]['macAddress'] = networks[key]['MacAddress']

                result['ansible_facts'][service.name][container.name] = facts

        return result

    def cmd_pull(self):
        result = dict(
            changed=False,
            actions=[],
        )

        if not self.check_mode:
            for service in self.project.get_services(self.services, include_deps=False):
                if 'image' not in service.options:
                    continue

                self.log('Pulling image for service %s' % service.name)
                # store the existing image ID
                old_image_id = ''
                try:
                    image = service.image()
                    if image and image.get('Id'):
                        old_image_id = image['Id']
                except NoSuchImageError:
                    pass
                except Exception as exc:
                    self.client.fail("Error: service image lookup failed - %s" % str(exc))

                # pull the image
                try:
                    service.pull(ignore_pull_failures=False)
                except Exception as exc:
                    self.client.fail("Error: pull failed with %s" % str(exc))

                # store the new image ID
                new_image_id = ''
                try:
                    image = service.image()
                    if image and image.get('Id'):
                        new_image_id = image['Id']
                except NoSuchImageError as exc:
                    self.client.fail("Error: service image lookup failed after pull - %s" % str(exc))

                if new_image_id != old_image_id:
                    # if a new image was pulled
                    result['changed'] = True
                    result['actions'].append(dict(
                        service=service.name,
                        pulled_image=dict(
                            name=service.image_name,
                            id=new_image_id
                        )
                    ))
        return result

    def cmd_build(self):
        result = dict(
            changed=False,
            actions=[]
        )
        if not self.check_mode:
            for service in self.project.get_services(self.services, include_deps=False):
                if service.can_be_built():
                    self.log('Building image for service %s' % service.name)
                    # store the existing image ID
                    old_image_id = ''
                    try:
                        image = service.image()
                        if image and image.get('Id'):
                            old_image_id = image['Id']
                    except NoSuchImageError:
                        pass
                    except Exception as exc:
                        self.client.fail("Error: service image lookup failed - %s" % str(exc))

                    # build the image
                    try:
                        new_image_id = service.build(pull=self.pull, no_cache=self.nocache)
                    except Exception as exc:
                        self.client.fail("Error: build failed with %s" % str(exc))

                    if new_image_id not in old_image_id:
                        # if a new image was built
                        result['changed'] = True
                        result['actions'].append(dict(
                            service=service.name,
                            built_image=dict(
                                name=service.image_name,
                                id=new_image_id
                            )
                        ))
        return result

    def cmd_down(self):
        result = dict(
            changed=False,
            actions=[]
        )
        for service in self.project.services:
            containers = service.containers(stopped=True)
            if len(containers):
                result['changed'] = True
            result['actions'].append(dict(
                service=service.name,
                deleted=[container.name for container in containers]
            ))
        if not self.check_mode and result['changed']:
            image_type = image_type_from_opt('--rmi', self.remove_images)
            try:
                self.project.down(image_type, self.remove_volumes, self.remove_orphans)
            except Exception as exc:
                self.client.fail("Error stopping project - %s" % str(exc))
        return result

    def cmd_stop(self, service_names):
        result = dict(
            changed=False,
            actions=[]
        )
        for service in self.project.services:
            if not service_names or service.name in service_names:
                service_res = dict(
                    service=service.name,
                    stop=[]
                )
                for container in service.containers(stopped=False):
                    result['changed'] = True
                    service_res['stop'].append(dict(
                        id=container.id,
                        name=container.name,
                        short_id=container.short_id
                    ))
                result['actions'].append(service_res)
        if not self.check_mode and result['changed']:
            out_redir_name, err_redir_name = make_redirection_tempfiles()
            try:
                with stdout_redirector(out_redir_name):
                    with stderr_redirector(err_redir_name):
                        self.project.stop(service_names=service_names, timeout=self.timeout)
            except Exception as exc:
                fail_reason = get_failure_info(exc, out_redir_name, err_redir_name,
                                               msg_format="Error stopping project %s")
                self.client.module.fail_json(**fail_reason)
            else:
                cleanup_redirection_tempfiles(out_redir_name, err_redir_name)
        return result

    def cmd_restart(self, service_names):
        result = dict(
            changed=False,
            actions=[]
        )

        for service in self.project.services:
            if not service_names or service.name in service_names:
                service_res = dict(
                    service=service.name,
                    restart=[]
                )
                for container in service.containers(stopped=True):
                    result['changed'] = True
                    service_res['restart'].append(dict(
                        id=container.id,
                        name=container.name,
                        short_id=container.short_id
                    ))
                result['actions'].append(service_res)

        if not self.check_mode and result['changed']:
            out_redir_name, err_redir_name = make_redirection_tempfiles()
            try:
                with stdout_redirector(out_redir_name):
                    with stderr_redirector(err_redir_name):
                        self.project.restart(service_names=service_names, timeout=self.timeout)
            except Exception as exc:
                fail_reason = get_failure_info(exc, out_redir_name, err_redir_name,
                                               msg_format="Error restarting project %s")
                self.client.module.fail_json(**fail_reason)
            else:
                cleanup_redirection_tempfiles(out_redir_name, err_redir_name)
        return result

    def cmd_scale(self):
        result = dict(
            changed=False,
            actions=[]
        )
        for service in self.project.services:
            if service.name in self.scale:
                service_res = dict(
                    service=service.name,
                    scale=0
                )
                containers = service.containers(stopped=True)
                scale = self.parse_scale(service.name)
                if len(containers) != scale:
                    result['changed'] = True
                    service_res['scale'] = scale - len(containers)
                    if not self.check_mode:
                        try:
                            service.scale(scale)
                        except Exception as exc:
                            self.client.fail("Error scaling %s - %s" % (service.name, str(exc)))
                    result['actions'].append(service_res)
        return result

    def parse_scale(self, service_name):
        try:
            return int(self.scale[service_name])
        except ValueError:
            self.client.fail("Error scaling %s - expected int, got %s",
                             service_name, str(type(self.scale[service_name])))


def main():
    argument_spec = dict(
        project_src=dict(type='path'),
        project_name=dict(type='str',),
        files=dict(type='list', elements='path'),
        state=dict(type='str', choices=['absent', 'present'], default='present'),
        definition=dict(type='dict'),
        hostname_check=dict(type='bool', default=False),
        recreate=dict(type='str', choices=['always', 'never', 'smart'], default='smart'),
        build=dict(type='bool', default=False),
        remove_images=dict(type='str', choices=['all', 'local']),
        remove_volumes=dict(type='bool', default=False),
        remove_orphans=dict(type='bool', default=False),
        stopped=dict(type='bool', default=False),
        restarted=dict(type='bool', default=False),
        scale=dict(type='dict'),
        services=dict(type='list', elements='str'),
        dependencies=dict(type='bool', default=True),
        pull=dict(type='bool', default=False),
        nocache=dict(type='bool', default=False),
        debug=dict(type='bool', default=False),
        timeout=dict(type='int', default=DEFAULT_TIMEOUT)
    )

    mutually_exclusive = [
        ('definition', 'project_src'),
        ('definition', 'files')
    ]

    client = AnsibleDockerClient(
        argument_spec=argument_spec,
        mutually_exclusive=mutually_exclusive,
        supports_check_mode=True,
        min_docker_api_version='1.20',
    )

    result = ContainerManager(client).exec_module()
    client.module.exit_json(**result)


if __name__ == '__main__':
    main()
